The World is Made of Glass Ltd. has dated this piece to the 18th Century.
The decanter is in excellent condition for its age.

The decanter has been blown in clear glass and is wheel-engraved with hatched swags and tails to the shoulders above floral fronds. The initials "MJC"(?) are engraved into one side. The decanter measures 8.2 cm (3.3 inches) across at the polished base. The decanter is 19.5 cm (7.8 inches) in height without the stopper, and 24.5 cm (9.8 inches) tall with the stopper inserted. The stopper is of cut lozenge form and is possibly the original. There are no chips, cracks, significant scratches or any obvious evidence of restoration.
Lead glass weighing in at 315 g. (~ 11 oz.).
The World is Made of Glass Ltd. has dated this piece to the 18th Century.
Dealing in antique and collectable glass from the 17th to the 21st century.
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